Price: the floor and the ceiling
Two numbers frame every search here, the cheapest tub on sale and the most expensive. In the recorded range, prices run €303.95 to €15,784.44, which tells you how little a shortlist built on entry price can have in common with one built on top specification.
At the floor, Wave Spas Main lists €303.95, Lay-Z-Spa lists £379.99 and Saunaloft lists €529. All four brands offer finance, so the jump from the cheapest model to the dearest is a difference in monthly repayments rather than one large payment. Treat each entry price as the purchase price of a single tub, then set a ceiling for yourself before browsing the Hot tubs and swim spas ranking.
Currency matters here. One brand quotes in pounds and the others in euros, so the entry prices only compare cleanly once you convert or once you read them in the currency of your own delivery address.
Market and the company behind the tub
Where a brand trades tells you which price list and which delivery terms you will actually get. Lay-Z-Spa is based in GB, trades as Wilton Bradley Ltd and ships to GB, JE and GG.
Saunaloft is based in DE and sells as Enners UG (haftungsbeschraenkt), delivering to DE, AT and NL. Wave Spas Main is registered in GB as Wave Direct Limited and covers the most ground, GB, US and FR. If you are outside the core markets of a brand, the advertised entry price may not be the price you pay, so check the market list before comparing figures.
The legal entity is also the name on your warranty paperwork, which is worth knowing before you buy rather than after.
Seating, and what changes when you want to swim
Capacity is the quickest way to separate a soaking tub from something you can swim lengths in. Recorded seating across the group spans 6 to 13 people. Lay-Z-Spa's largest is 8 people and Saunaloft's is 8 people, while Wave Spas Main lists 6 people as its top figure.
Product types tell you the same story from a different angle. Saunaloft covers hot tub, inflatable hot tub and swim spa, so swim spas are in scope. Lay-Z-Spa covers hot tub, inflatable hot tub and cold plunge, which includes cold plunges rather than swim spas, and Wave Spas Main covers hot tub and inflatable hot tub. If swimming is the reason you are shopping, that shortlist narrows quickly.
Heater output and plug and play setup
Heater power is the most useful technical number for judging how a tub behaves, since it drives how fast the water warms and how much running cost you sign up for. Saunaloft lists 6 to 9 kW at the top of its range, well ahead of Lay-Z-Spa at 2.05 kW and Wave Spas Main at 1.8 kW. A bigger figure usually means a hardier build for colder gardens, not just faster heating.
All three describe their tubs as plug and play, so none of them needs a specialist electrical connection. That removes one of the costs people forget when budgeting, and it makes the price and heater power lines the real trade-off to argue about.
Delivery and support once you own it
Delivery is included with Lay-Z-Spa and with Wave Spas Main, which means the quoted price is the landed price. Saunaloft and Almost Heaven Saunas do not include delivery, so add a haulage cost to the entry price before you compare them against a tub that ships free. On a big box, that addition can move a brand several places up or down your shortlist.
Support is easier to judge. Lay-Z-Spa offers email, phone and help centre, Saunaloft offers email, phone and help centre and Wave Spas Main offers email, chat and help centre. A community channel is useful for setup questions, while a phone line matters more once a pump fails in winter.
Warranty and how long the company has been trading
Warranty length varies widely across this kind of product, and the recorded figures run 1 to 99 years. Lay-Z-Spa offers 2 years and Wave Spas Main offers 2 years, so those two are directly comparable while a longer cover elsewhere is worth a closer read of what it excludes.
Company age gives you a second signal. Lay-Z-Spa was founded in 2007 and Wave Spas Main in 2018, while Almost Heaven Saunas dates back to 1977. A longer trading record matters for spares availability, which is the part of the ownership experience most buyers underestimate.
Putting the sections together
Work through the comparisons in a fixed order so nothing gets skipped: market first, since it decides which price list applies, then entry price against your ceiling, then seating and product type, then heater power, then delivery, then warranty and support.
Once the numbers have narrowed things to two or three names, read the individual write-ups. The Lay-Z-Spa, Saunaloft, Wave Spas Main and Almost Heaven Saunas pages will tell you how each of these brands handles the details the figures cannot show, such as setup, spares and paperwork.